EP2848493B1 - Aufhängungssystem für Kinderwagen - Google Patents

Aufhängungssystem für Kinderwagen Download PDF

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Publication number
EP2848493B1
EP2848493B1 EP14184142.9A EP14184142A EP2848493B1 EP 2848493 B1 EP2848493 B1 EP 2848493B1 EP 14184142 A EP14184142 A EP 14184142A EP 2848493 B1 EP2848493 B1 EP 2848493B1
Authority
EP
European Patent Office
Prior art keywords
stroller
spring
axle
spring retainer
aperture
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP14184142.9A
Other languages
English (en)
French (fr)
Other versions
EP2848493A3 (de
EP2848493A2 (de
Inventor
Richard Bastien
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MONAHAN PRODUCTS LLC
Original Assignee
MONAHAN PRODUCTS LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MONAHAN PRODUCTS LLC filed Critical MONAHAN PRODUCTS LLC
Publication of EP2848493A2 publication Critical patent/EP2848493A2/de
Publication of EP2848493A3 publication Critical patent/EP2848493A3/de
Application granted granted Critical
Publication of EP2848493B1 publication Critical patent/EP2848493B1/de
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Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B9/00—Accessories or details specially adapted for children's carriages or perambulators
    • B62B9/18—Resilient suspensions of bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B2301/00—Wheel arrangements; Steering; Stability; Wheel suspension
    • B62B2301/20—Resilient wheel suspension using springs

Definitions

  • aspects and embodiments disclosed herein relate generally to child conveyance devices such as strollers and carriages, and more specifically, to suspension systems for same.
  • strollers Young children are often conveyed by caregivers or parents in various types of baby carriages or strollers, referred to herein collectively as "strollers.” Many strollers are not provided with any form of suspension system. In such strollers, when a wheel of the stroller is pushed over an obstacle, for example, a rock, stick, or curb, an impact force may be conveyed from the wheel and through the fame of the stroller to a child in the stroller. Such an impact force may be uncomfortable and in some instances dangerous to the child.
  • an obstacle for example, a rock, stick, or curb
  • EP 1700770 discloses a stroller according to the preamble of claim 1, the stroller having a wheel connected to a frame by a fork presenting an upper part for connection with the frame.
  • Two parallel flanges are perpendicular to a rotational shaft of the wheel.
  • Each flange has an oblong hole for receiving the shaft.
  • US 4,847,945 discloses a wheel attachment mechanism for securing wheels to a child vehicle, such as a stroller or a carriage.
  • a wheel axle housing is removeably secured to a suspension portion of an intermediate housing.
  • a stroller comprising a frame member and a suspension block coupled to the frame member.
  • the suspension block includes a body and a suspension mechanism coupled to the body and disposed at an acute angle from a vertical axis of the body.
  • the stroller further includes a wheel mounted on an axle, the axle supported by the suspension block.
  • the suspension mechanism includes an aperture defined by sidewalls extending from sides of the suspension block, the axle passing through the aperture.
  • the aperture is disposed at an angle of about 30° from the vertical axis of the body when the axle is in a home position.
  • the suspension mechanism includes a spring retainer supported by the suspension mechanism.
  • the axle passes through an axle aperture defined in the spring retainer.
  • the spring retainer is at least partially disposed within a spring retention chamber defined in the body of the suspension block.
  • the spring retainer is biased away from an upper wall of the spring retention chamber.
  • the spring retainer is biased away from the upper wall of the spring retention chamber by spring having a lower end coupled to the spring retainer and an upper end disposed against the upper wall of the spring retention chamber.
  • the spring retainer is retained within the spring retention chamber by the axle.
  • the suspension mechanism is configured and capable of absorbing an impact force applied to the wheel in a horizontal direction, an impact force applied to the wheel in a vertical direction, or an impact force applied to the wheel with components in both the horizontal direction and the vertical direction.
  • a suspension block for a stroller includes a body and a spring retention chamber defined in the body and having an axis disposed at an acute angle relative to a vertical axis of the body.
  • the suspension block further comprises a suspension mechanism coupled to the body and including a biasing member configured to receive an axle of a wheel of the stroller.
  • the suspension block further comprises an aperture passing through the body and disposed at a non-zero acute angle from a vertical axis of the body.
  • the aperture forms an opening along an elongate axis of the spring retention chamber.
  • the aperture is defined by sidewalls extending from sides of the suspension block.
  • the biasing member comprises a spring retainer.
  • the suspension block further comprises a spring disposed between the spring retainer and an upper wall of the spring retention chamber.
  • an end of the spring fits around an upper reduced diameter portion of the spring retainer and rests against an upper shoulder portion of the spring retainer.
  • the spring exerts a force on the spring retainer biasing the spring retainer out of the spring retention chamber.
  • the spring retainer contacts a portion of an internal wall of the spring retention chamber.
  • Some stroller designs include suspension systems which may facilitate the absorption of at least a portion of a vertical impact force which might be experienced by, for example, passing one or more wheels of a stroller over an obstacle such as a rock, stick, curb, or step.
  • Such stroller designs do not provide for absorption of horizontal impact forces, for example, impact forces which might be experienced when a stroller is inadvertently pushed against a door, wall, or other obstacle.
  • a child present in such strollers may be at least partially protected from vertical impact forces, but not from horizontal impact forces.
  • the directional term “horizontal” refers to a direction of travel of a stroller when moving normally on wheels of the stroller.
  • the directional term “vertical” refers to a direction approximately perpendicular to the direction of travel of a stroller when moving on the wheels of stroller.
  • the suspension system includes a plurality of impact absorbing mechanisms, one of which may be applied to each wheel of a stroller.
  • an impact absorbing mechanism is applied to only front wheels of a stroller, while in other embodiments, impact absorbing mechanisms may be applied only to rear wheels of a stroller, and in other embodiments to all wheels of a stroller.
  • aspects and embodiments of the disclosed suspension system may provide for an axle of a wheel of a stroller to move both horizontally and vertically relative to a frame of the stroller upon application of an impact force to the wheel of the stroller.
  • the wheel and axle may be reversibly displaced in both a horizontal and vertical direction relative to the frame of the stroller.
  • a dampening mechanism in a suspension system applied to a wheel of the stroller may absorb the vertical and/or horizontal impact force, reducing the transfer of the impact force through the frame of the stroller to a child present in the stroller.
  • a resilient element in a suspension system applied to an axle and wheel of the stroller may bias the axle and wheel into a resting or home position from which the axle and wheel may be displaced upon application of an impact force.
  • the resilient element may displace the axle and wheel back to the resting or home position after the impact force has been absorbed or dissipated.
  • FIG. 1 An isometric view of an embodiment of the disclosed suspension system mounted to a wheel and frame assembly of a stroller system is illustrated in FIG. 1 .
  • a frame member 110 (only a lower portion of which is illustrated) is coupled to a wheel 120 of a stroller. Coupling between the frame member 110 and the wheel 120 is made through a suspension block 130.
  • the suspension block 130 includes a suspension block aperture 135 which fits around a lower end 115 of the frame member 110 or which is otherwise secured to the lower end 115 of the frame member 110.
  • both the suspension block aperture 135 and the lower end 115 of the frame member 110 are cylindrical in cross section and the suspension block 130 may rotate about a vertical axis of the lower end 115 of the frame member 110 to allow for the wheel 120 to turn relative to the frame member 110.
  • the suspension block 130 may rotate only about the vertical axis of the lower end 115 of the frame member 110. In some embodiments, however, the suspension block 130 is secured to the frame member 110 and does not rotate about the lower end 115 of the frame member 110.
  • the suspension block 130 includes a diagonal aperture 140 through which an axle 150 of the wheel passes.
  • the diagonal aperture 140 may be defined by sidewalls 145 extending from sides of the suspension block 130.
  • the diagonal aperture 140 may be disposed at a non-zero angle from a vertical axis of the stroller and from a horizontal axis of the stroller.
  • the diagonal aperture 140 may be disposed at an acute angle of about 30° from a vertical axis of the stroller or about 45° from horizontal and vertical axes of the stroller when the axle 150 is in the home position, although in other embodiments, the diagonal aperture 140 may be disposed at other angles.
  • Embodiments disclosed herein are not limited to including a diagonal aperture 140 having a shape and/or orientation as illustrated in FIG. 1 .
  • the axle may extend across the stroller to a second wheel and form a common axle for both the wheel 120 and the second wheel.
  • a single suspension block 130 may provide impact protection for both the wheel 120 and the second wheel.
  • each wheel of the stroller is mounted on a separate axle 150 and each wheel may be provided with an associated suspension block 130.
  • the axle 150 is supported by a suspension mechanism disposed within the suspension block 130.
  • the axle 150 passes through an axle aperture 165 defined in a spring retainer 160 disposed within the body of the suspension block 130.
  • a spring 170 biases the spring retainer 160 out of the body of the suspension bock 130 and biases the axle 150 toward a lower forward end 140' of the diagonal aperture 140.
  • the axle 150 is considered to be in the resting or home position.
  • a forward horizontal direction of travel of the wheel 120 is indicated by the arrow F in FIG. 2 .
  • FIG. 3 which is a cross sectional view of a portion of the suspension block 130, it can be seen that a lower end of the spring 170 engages with and couples to the spring retainer 160.
  • the lower end of the spring 170 may couple to the spring retainer 160 by fitting around an upper reduced diameter portion 175 of the spring retainer 160.
  • the lower end of the spring 170 may rest against an upper shoulder portion 180 of the spring retainer 160.
  • Other methods of coupling the spring 170 to the spring retainer 160 will be recognized by one of ordinary skill in the art and embodiments disclosed herein are not limited to including the illustrated mechanism for coupling the spring 170 to the spring retainer 160 unless explicitly set forth in the claims.
  • the spring retainer 160 and spring 170 are disposed within a spring retention chamber 190 defined in the body of the suspension block 130.
  • the spring retention chamber 190 may include an elongate chamber having an axis A along its elongate dimension which is disposed at a non-zero angle relative to a vertical axis A' of the suspension block aperture 135 and to an axis normal to the vertical axis A' of the suspension block aperture 135, for example, at an acute angle of about 30° or about 45° relative to the vertical axis A' of the suspension block aperture 135.
  • An upper end of the spring 170 opposite from the lower end of the spring 170 which engages and couples to the spring retainer 160 is disposed against an upper internal wall 195 of the spring retention chamber 190.
  • the vertical axis of the body of the suspension block and the vertical axis of the lower end 115 of the frame member 110 may be considered parallel to the vertical axis A' of the suspension block aperture 135.
  • An outer surface 200 of the spring retainer 160 and at least a portion of an inner wall 205 of the spring retention chamber may have substantially similar cross sections, for example, as illustrated in FIG. 4 , substantially circular cross sections.
  • a small clearance is provided between the outer surface 200 of the spring retainer 160 and the portion of the inner wall 205 of the spring retention chamber 190 so that the spring retainer 160 may reciprocate up and down through the spring retention chamber 190, i.e., towards and away from the upper internal wall 195 of the spring retention chamber 190.
  • the outer surface 200 of the spring retainer 160 and the inner wall 205 of the spring retention chamber 190 may have different cross sections than illustrated.
  • the outer surface 200 of the spring retainer 160 and the inner wall 205 of the spring retention chamber 190 may have cross sections which are rectangular, oval, or having the shape of any other regular or irregular polygon.
  • the outer surface 200 of the spring retainer 160 may contact the inner wall 205 of the spring retention chamber 190 about a substantial amount or an entirety of its periphery.
  • the inner wall 205 of the spring retention chamber 190 may have portions which contact the outer surface 200 of the spring retainer 160 and other portions which do not.
  • the portions of the inner wall 205 of the spring retention chamber 190 which contact the outer surface 200 of the spring retainer 160 may function as linear bearings which position the spring retainer 160 within the retention chamber 190 and guide movement of the spring retainer 160 within the retention chamber 190.
  • the portions of the inner wall 205 of the spring retention chamber 190 which contact the outer surface 200 of the spring retainer 160 may frictionally engage the outer surface 200 of the spring retainer 160, thus providing a damping mechanism slowing the movement of the spring retainer 160 through the retention chamber 190 due to the application of a impact force to the wheel 120 and/or a force applied from the spring 170.
  • the spring retainer 160 is biased away from the upper internal wall 195 of the spring retention chamber 190 by the spring 170.
  • the spring retainer 160 is retained within the spring retention chamber 190 because as the spring retainer 160 is pushed out from the spring retention chamber 190 it comes to a point where the axle 150 which passes through the axle aperture 165 defined in the spring retainer 160 comes into contact with the sidewall 145 of the diagonal aperture 140 at the lower forward end 140' of the diagonal aperture 140, preventing further movement of the spring retainer 160 from within the spring retention chamber 190.
  • a biasing and/or shock absorbing element other than or in addition to the spring 170 may be provided between the spring retainer 160 and upper internal wall 195 of the spring retention chamber 190.
  • the biasing element may be any element which provides a force biasing the spring retainer 160 away from the upper internal wall 195 of the spring retention chamber 190.
  • the biasing element may include, for example, one or more of a pneumatic piston, a balloon or bladder, a fluid or gas filled shock absorber, a pair of magnets having like poles facing one another with one of the magnets disposed on an upper portion of the spring retainer 160 and the other on the upper internal wall 195 of the spring retention chamber 190, an electromagnetic coil or solenoid, a resilient rubber or foam material, or any other form of biasing and/or shock absorbing element or system known in the art.
  • an impact force is applied to the wheel 120 in a rearward direction (a direction opposite that of arrow F) and/or an upwards vertical direction
  • the axle 150 pushes on the spring retainer 160, displacing the spring retainer 160 against the biasing force of the spring 170 upwards through the spring retention chamber 190.
  • the axle 150 may travel in a rearward and upward direction through a portion of the diagonal aperture 140.
  • the axle 150 may travel in a rearward and upward direction through the diagonal aperture 140 until the axle comes into contact with the rearward upper portion 140" of the sidewall 145.
  • the spring 170 absorbs the energy of the impact force dampening the force so that a sharp impact is not transferred into the frame member 110 of the stroller and to a child who may be present in the stroller.
  • a first spring 170 or other biasing and/or shock absorbing element may be disposed against an upper side of the spring retainer 160 as illustrated in FIGS. 2 and 3
  • a second spring 170 or other biasing and/or shock absorbing element may be disposed against a lower side of the spring retainer 160
  • the spring retainer 160 may be disposed within the spring retention chamber 190, which may be modified from the spring retention chamber 190 illustrated in FIGS. 2 and 3 to include a closed lower end defining a lower internal wall.
  • the second spring 170 or other biasing and/or shock absorbing element may be disposed between the lower side of the spring retainer 160 and the lower internal wall of the spring retention chamber.
  • Such a suspension block could absorb and/or dampen impact forces applied to a wheel having an axis supported by the spring retainer 160 in both a forward and a rearward direction and in both an upward and a downward direction.
  • the suspension system may be disassembled and reassembled by a user or by a service technician to, for example, replace one or more components if desired.
  • the axle 150 may be slid through the axle aperture 165 until it disengages from the spring retainer 160.
  • the spring retainer 160 and/or spring 170 may then be removed from the spring retention chamber 190.
  • the spring retainer 160 and/or spring 170 may be replaced and/or inserted back into the spring retention chamber 190. Insertion of the axle 150 through the diagonal aperture 140 and through the axle aperture 165 will secure the spring retainer 160 and spring 170 within the spring retention chamber 190.

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  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Body Suspensions (AREA)
  • Handcart (AREA)
  • Carriages For Children, Sleds, And Other Hand-Operated Vehicles (AREA)

Claims (13)

  1. Kinderwagen, der umfasst:
    ein Rahmenelement (110);
    einen an das Rahmenelement gekuppelten Aufhängungsblock (130) und ein auf einer Achse (150) befestigtes Rad (120), wobei die Achse durch den Aufhängungsblock gehalten wird;
    dadurch gekennzeichnet, dass der Aufhängungsblock aufweist:
    einen Körper;
    einen an den Körper gekuppelten und mit einem spitzen Winkel von einer vertikalen Achse des Körpers angeordneten Aufhängungsmechanismus, wobei der Aufhängungsmechanismus einen Durchlass (140) aufweist, der durch Seitenwände (145) definiert sich von Seiten des Aufhängungsblocks erstreckt, wobei der Durchlass ein unteres Vorderende (140') und einen rückwärtigen oberen Abschnitt (140") hat; und
    die Achse (150), die durch den Durchlass verläuft, den Aufhängungsmechanismus, der konfiguriert wird und geeignet ist, mit Komponenten in sowohl einer horizontalen Richtung als auch in einer vertikalen Richtung durch die Achse, die sich in eine Rückwärts- und Aufwärtsrichtung durch einen Abschnitt des Durchlasses bewegt, auf das Rad angewendete Aufprallkraft zu absorbieren.
  2. Kinderwagen nach Anspruch 1, wobei der Aufhängungsmechanismus mit einem Winkel von etwa 30° von der vertikalen Achse des Körpers angeordnet wird, wenn die Achse in einer Ausgangsstellung ist.
  3. Kinderwagen nach Anspruch 1, wobei der Aufhängungsmechanismus einen durch den Aufhängungsmechanismus gehaltenen Federhaltebügel (160) aufweist.
  4. Kinderwagen nach Anspruch 3, wobei die Achse durch einen in dem Federhaltebügel definierten Achsdurchlass verläuft.
  5. Kinderwagen nach Anspruch 3 oder 4, wobei der Federhaltebügel mindestens teilweise innerhalb einer in dem Körper des Aufhängungsblocks definierten Federrückhaltekammer angeordnet wird.
  6. Kinderwagen nach Anspruch 5, wobei der Federhaltebügel weg von einer oberen Wand der Federrückhaltekammer vorgespannt wird.
  7. Kinderwagen nach Anspruch 5 oder 6, der des Weiteren eine Feder (170) umfasst, die mit einem unteren Ende an den Federhaltebügel gekuppelt und einem oberen Ende gegen die obere Wand der Federrückhaltekammer angeordnet wird.
  8. Kinderwagen nach Anspruch 5, 6 oder 7, wobei mindestens ein Abschnitt des Federhaltebügels innerhalb der Federrückhaltekammer durch die Achse gehalten wird.
  9. Kinderwagen nach einem vorhergehenden Anspruch, wobei der Durchlass durch den Körper verläuft und mit einem spitzen Winkel ungleich null von einer vertikalen Achse des Körpers angeordnet wird.
  10. Kinderwagen nach einem vorhergehenden Anspruch, wobei der Durchlass einen in dem Körper des Aufhängungsblocks definierten Durchlass entlang einer länglichen Achse einer Federrückhaltekammer bildet.
  11. Kinderwagen nach einem der Ansprüche 7 bis 10, wobei ein Ende der Feder rund um einen oberen verringerten Durchmesserteil des Federhaltebügels passt und gegen einen oberen Schulterabschnitt des Federhaltebügels lagert.
  12. Kinderwagen nach einem vorhergehenden Anspruch, wobei der Aufhängungsblock Aufprallschutz für sowohl das Rad als auch ein zweites Rad des Kinderwagens bereitstellt.
  13. Kinderwagen nach einem vorhergehenden Anspruch, wobei der Aufhängungsblock um eine vertikale Achse eines unteren Ende des Rahmenelements dreht.
EP14184142.9A 2013-09-12 2014-09-09 Aufhängungssystem für Kinderwagen Active EP2848493B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US14/024,768 US8967647B1 (en) 2013-09-12 2013-09-12 Suspension system for child stroller

Publications (3)

Publication Number Publication Date
EP2848493A2 EP2848493A2 (de) 2015-03-18
EP2848493A3 EP2848493A3 (de) 2015-05-06
EP2848493B1 true EP2848493B1 (de) 2017-04-26

Family

ID=51584930

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14184142.9A Active EP2848493B1 (de) 2013-09-12 2014-09-09 Aufhängungssystem für Kinderwagen

Country Status (3)

Country Link
US (1) US8967647B1 (de)
EP (1) EP2848493B1 (de)
CN (1) CN104442987B (de)

Families Citing this family (5)

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USD785511S1 (en) * 2014-11-19 2017-05-02 Royalty Bugaboo Gmbh Rim cover
WO2016130671A1 (en) * 2015-02-10 2016-08-18 Austlen Baby Co. Stroller with a dual spring rear suspension
DE102016215495B4 (de) * 2015-08-20 2023-02-23 Wonderland Nurserygoods Company Limited Federungssystem zum Absorbieren von Stössen und damit ausgestatteter Kinderwagen
US10449987B2 (en) 2018-01-17 2019-10-22 Evenflo Company, Inc. Tandem stroller with sliding carriage
CN113002678A (zh) * 2019-12-20 2021-06-22 明门瑞士股份有限公司 车轮避震结构及儿童载具

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IL62632A (en) * 1981-04-10 1984-03-30 Amos Evron Infants' carriage
US4847945A (en) * 1988-05-16 1989-07-18 Dorel Industries, Inc. Dismantlable wheel attachment mechanism with swivel joint protector
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Also Published As

Publication number Publication date
EP2848493A3 (de) 2015-05-06
CN104442987B (zh) 2018-01-19
US8967647B1 (en) 2015-03-03
EP2848493A2 (de) 2015-03-18
CN104442987A (zh) 2015-03-25
US20150069731A1 (en) 2015-03-12

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